Add AGENTS.md

Changelog-None
Signed-off-by: alltheseas <64376233+alltheseas@users.noreply.github.com>

AGENTS.md

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+# Agents
+
+## Damus Overview
+
+Damus is an iOS client built around a local relay model ([damus-io/damus#3204](https://github.com/damus-io/damus/pull/3204)) to keep interactions snappy and resilient. The app operates on `nostrdb` ([source](https://github.com/damus-io/damus/tree/master/nostrdb)), and agents working on Damus should maximize usage of `nostrdb` facilities whenever possible.
+
+## Codebase Layout
+
+- `damus/` contains the SwiftUI app. Key subdirectories: `Core` (protocol, storage, networking, nostr primitives), `Features` (feature-specific flows like Timeline, Wallet, Purple), `Shared` (reusable UI components and utilities), `Models`, and localized resources (`*.lproj`, `en-US.xcloc`).
+- `nostrdb/` hosts the embedded database. Swift bindings (`Ndb.swift`, iterators) wrap a C/LMDB core; prefer these abstractions when working with persistence or queries.
+- `damus-c/` bridges C helpers (e.g., WASM runner) into Swift; check `damus-Bridging-Header.h` before adding new bridges.
+- `nostrscript/` contains AssemblyScript sources compiled to WASM via the top-level `Makefile`.
+- Tests live in `damusTests/` (unit/snapshot coverage) and `damusUITests/` (UI smoke tests). Keep them running before submitting changes.
+
+## Development Workflow
+
+- Use `just build` / `just test` for simulator builds and the primary test suite (requires `xcbeautify`). Update or add `just` recipes if new repeatable workflows emerge.
+- Xcode project is `damus.xcodeproj`; the main scheme is `damus`. Ensure new targets or resources integrate cleanly with this scheme.
+- Rebuild WASM helpers with `make` when touching `nostrscript/` sources.
+- Follow `docs/DEV_TIPS.md` for debugging (enabling Info logging, staging push notification settings) and keep tips updated when discovering new workflows.
+
+## Testing Expectations
+
+- Provide a concrete test report in each PR (see `.github/pull_request_template.md`). Document devices, OS versions, and scenarios exercised.
+- Add or update unit tests in `damusTests/` alongside feature changes, especially when touching parsing, storage, or replay logic.
+- UI regressions should include `damusUITests/` coverage or rationale when automation is impractical.
+- Snapshot fixtures under `damusTests/__Snapshots__` must be regenerated deliberately; explain updates in commit messages.
+
+## Contribution Standards
+
+- Sign all commits (`git commit -s`) and include appropriate `Changelog-*`, `Closes:`, or `Fixes:` tags as described in `docs/CONTRIBUTING.md`.
+- Keep patches scoped: one logical change per commit, ensuring the app builds and runs after each step.
+- Favor Swift-first solutions that lean on `nostrdb` types (`Ndb`, `NdbNote`, iterators) before introducing new storage mechanisms.
+- Update documentation when workflows change, especially this file, `README.md`, or developer notes.
+
+## Agent Requirements
+
+1. Code should tend toward simplicity.
+2. Commits should be logically distinct.
+3. Commits should be standalone.
+4. Code should be human readable.
+5. Code should be human reviewable.
+6. Use code comments to add context.
+7. Review and follow `pull_request_template.md` when creating PRs for iOS Damus.